SBR bullpup clarification

SR420 · April 23, 2014, 11:01 AM

With regards to M14/M1A bullpup conversions meeting the NFA overall length (OAL) requirement of 26.0"

The official measurement is taken from the end of the butt stock to the crown of the barrel.
The 16.25" SOCOM barrel renders an OAL of 24.50".

Unless you want to add the 14.0 ounce, 2.0" factory butt stock spacer,
the 16.25" barrel does NOT meet NFA OAL requirements in the Rogue.

Bottom line:

Choosing an M14/M1A with an 18 or 22 inch barrel is the very BEST choice for your bullpup conversion.
An 18.0" barreled action in the Rogue renders a legal OAL of 26.25" when measured butt stock to crown.

A 22.0" barrel is the ONLY legal length for residents of California.

dogtown tom · April 25, 2014, 10:29 AM

Quote:

SR420 The official measurement is taken from the end of the butt stock to the crown of the barrel.

Actually it's to the end of the muzzle including any permanently attached muzzle device (like a flash hider or muzzle break)

Bill DeShivs · April 25, 2014, 02:48 PM

BRAKE!

SR420 · April 25, 2014, 03:22 PM

Pinning & welding the gas lock & muzzle device to the barrel is not a viable option in this case.

skizzums · April 25, 2014, 08:53 PM

I was under the impression that simply doing a spot weld or even solder that could esily be removed would count as a permanent attachment. could be wrong. but I understand on a weapon of value like an m14, most would not want to do that on their firearm

4thPoint · April 25, 2014, 10:42 PM

Quote:

The ATF procedure for measuring barrel length is to measure from the closed bolt (or breech-face) to the furthermost end of the barrel or permanently attached muzzle device.

Permanent methods of attachment include full-fusion gas or electric steel-seam welding, high-temperature (1100°F) silver soldering, or blind pinning with the pin head welded over.

Barrels are measured by inserting a dowel rod into the barrel until the rod stops against the bolt or breech-face. The rod is then marked at the furthermost end of the barrel or permanently attached muzzle device, withdrawn from the barrel, and measured.

Per the ATF.pdf

Tucker 1371 · April 26, 2014, 12:41 AM

Wow, THANK YOU for posting this SR420, as you know I am considering this stock myself. Does the bbl length of the scout model M1A include the length of the comp or is it 18 without the comp? I have an SEI Coast Guard Comp on mine which is a bit shorter than the stock brake.

SR420 · April 27, 2014, 09:15 AM

Thank you, 4thPoint

Quote:

Tucker 1371 Wow, THANK YOU for posting this SR420, as you know I am considering this stock myself. Does the bbl length of the scout model M1A include the length of the comp or is it 18 without the comp? I have an SEI Coast Guard Comp on mine which is a bit shorter than the stock brake.

Tucker, you are good-to-go with the Scout's 18.0" barrel. The 18.0" exceeds the minimum length without any muzzle device attached, so you can whatever muzzle device that suits you.

Enjoy!

Tucker 1371 · April 27, 2014, 12:14 PM

Awesome, I was hoping I wouldn't have to permanently pin it on.

SR420 · April 27, 2014, 01:29 PM

An 18.0" barreled action (Bush, Scout, MK14) in the Rogue renders a legal OAL of 26.25" without a muzzle device.

April 23, 2014, 11:01 AM	#1
SR420 Senior Member Join Date: May 12, 2005 Location: Georgia, USA Posts: 3,336	SBR bullpup clarification With regards to M14/M1A bullpup conversions meeting the NFA overall length (OAL) requirement of 26.0" The official measurement is taken from the end of the butt stock to the crown of the barrel. The 16.25" SOCOM barrel renders an OAL of 24.50". Unless you want to add the 14.0 ounce, 2.0" factory butt stock spacer, the 16.25" barrel does NOT meet NFA OAL requirements in the Rogue. Bottom line: Choosing an M14/M1A with an 18 or 22 inch barrel is the very BEST choice for your bullpup conversion. An 18.0" barreled action in the Rogue renders a legal OAL of 26.25" when measured butt stock to crown. A 22.0" barrel is the ONLY legal length for residents of California. __________________ The History and Development of the M14 EBR

April 25, 2014, 02:48 PM	#3
Bill DeShivs Senior Member Join Date: April 7, 2006 Posts: 10,981	BRAKE! __________________ Bill DeShivs, Master Cutler www.billdeshivs.com

April 25, 2014, 03:22 PM	#4
SR420 Senior Member Join Date: May 12, 2005 Location: Georgia, USA Posts: 3,336	Pinning & welding the gas lock & muzzle device to the barrel is not a viable option in this case. __________________ The History and Development of the M14 EBR

April 25, 2014, 08:53 PM	#5
skizzums Senior Member Join Date: July 1, 2013 Location: Douglasville, Ga Posts: 4,615	I was under the impression that simply doing a spot weld or even solder that could esily be removed would count as a permanent attachment. could be wrong. but I understand on a weapon of value like an m14, most would not want to do that on their firearm __________________ My head is bloody, but unbowed

April 26, 2014, 12:41 AM	#7
Tucker 1371 Senior Member Join Date: December 29, 2008 Location: East TN Posts: 2,649	Wow, THANK YOU for posting this SR420, as you know I am considering this stock myself. Does the bbl length of the scout model M1A include the length of the comp or is it 18 without the comp? I have an SEI Coast Guard Comp on mine which is a bit shorter than the stock brake. __________________ Sgt. of Marines, 5th Award Expert Rifle, 237/250 Expert Pistol, 382/400. D Co, 4th CEB, Engineers UP!! If you start a thread, be active in it. Don't leave us hanging. OEF 2011 Sangin, Afg. Molon Labe

April 27, 2014, 12:14 PM	#9
Tucker 1371 Senior Member Join Date: December 29, 2008 Location: East TN Posts: 2,649	Awesome, I was hoping I wouldn't have to permanently pin it on. __________________ Sgt. of Marines, 5th Award Expert Rifle, 237/250 Expert Pistol, 382/400. D Co, 4th CEB, Engineers UP!! If you start a thread, be active in it. Don't leave us hanging. OEF 2011 Sangin, Afg. Molon Labe

April 27, 2014, 01:29 PM	#10
SR420 Senior Member Join Date: May 12, 2005 Location: Georgia, USA Posts: 3,336	1/4 inch over minimum An 18.0" barreled action (Bush, Scout, MK14) in the Rogue renders a legal OAL of 26.25" without a muzzle device. __________________ The History and Development of the M14 EBR